The contribution in the total current fl...

The contribution in the total current flowing through a semiconductor due to electrons and holes are `3/4 and 1/4` respectively . If the drift velocity of electrons is `5/2` times that of holes at this temperature, then the ratio of concentration of electrons and holes is

`6:5`

`5:6`

`3:2`

`2:3`

Text Solution

Verified by Experts

The correct Answer is:

Current density J = nqv.
`implies J_e=n_eqv_e and n_hqv_h`
`impliesJ_e/J_h=n_e/n_hxxv_e/v_h=(3//4)/(1//4)=n_e/n_hxx5/2impliesn_e/n_h=6/5 `

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